(guid).v4[0],(guid).v4[1],(guid).v4[2],(guid).v4[3], \
(guid).v4[4],(guid).v4[5],(guid).v4[6],(guid).v4[7]
+/* Helpers:
+ * They ensure that invalid reads will not create problems.
+ * They are expansion safe
+ * They make the following assumptions:
+ * const uint8_t *p_peek exists and points to the start of a buffer
+ * int i_peek gives the size of the buffer pointed by p_peek
+ * const uint8_t *p_data exits and points to the data inside p_peek to be read.
+ */
+/* ASF_HAVE(n):
+ * Check that n bytes can be read */
+static inline bool AsfObjectHelperHave( const uint8_t *p_peek, int i_peek, const uint8_t *p_current, int i_wanted )
+{
+ if( i_wanted < 0 || i_wanted > i_peek )
+ return false;
+ return &p_current[i_wanted] <= &p_peek[i_peek];
+}
+#define ASF_HAVE(n) AsfObjectHelperHave( p_peek, i_peek, p_data, n )
+
+/* ASF_SKIP(n)
+ * Skip n bytes if possible */
+static inline void AsfObjectHelperSkip( const uint8_t *p_peek, int i_peek, uint8_t **pp_data, int i_wanted )
+{
+ if( AsfObjectHelperHave( p_peek, i_peek, *pp_data, i_wanted ) )
+ *pp_data += i_wanted;
+ else
+ *pp_data = (uint8_t*)&p_peek[i_peek];
+}
+#define ASF_SKIP(n) AsfObjectHelperSkip( p_peek, i_peek, (uint8_t**)&p_data, n )
+
+/* ASF_READX()
+ * Read X byte if possible, else return 0 */
+#define ASF_FUNCTION_READ_X(type, x, cmd ) \
+static inline type AsfObjectHelperRead##x( const uint8_t *p_peek, int i_peek, uint8_t **pp_data ) { \
+ uint8_t *p_data = *pp_data; \
+ type i_ret = 0; \
+ if( ASF_HAVE(x) ) \
+ i_ret = cmd; \
+ ASF_SKIP(x); \
+ *pp_data = p_data; \
+ return i_ret; }
+ASF_FUNCTION_READ_X( uint8_t, 1, *p_data )
+ASF_FUNCTION_READ_X( uint16_t, 2, GetWLE(p_data) )
+ASF_FUNCTION_READ_X( uint32_t, 4, GetDWLE(p_data) )
+ASF_FUNCTION_READ_X( uint64_t, 8, GetQWLE(p_data) )
+#define ASF_READ1() AsfObjectHelperRead1( p_peek, i_peek, (uint8_t**)&p_data )
+#define ASF_READ2() AsfObjectHelperRead2( p_peek, i_peek, (uint8_t**)&p_data )
+#define ASF_READ4() AsfObjectHelperRead4( p_peek, i_peek, (uint8_t**)&p_data )
+#define ASF_READ8() AsfObjectHelperRead8( p_peek, i_peek, (uint8_t**)&p_data )
+
+/* ASF_READS(n)
+ * Read a string of n/2 wchar long ie n bytes. Do a stupid conversion (suppose latin1)
+ * Return allocated "" if not possible */
+static char *AsfObjectHelperReadString( const uint8_t *p_peek, int i_peek, uint8_t **pp_data, int i_size )
+{
+ uint8_t *p_data = *pp_data;
+ char *psz_string;
+ if( ASF_HAVE(i_size) )
+ {
+ psz_string = calloc( i_size/2 + 1, sizeof( char ) );
+ if( psz_string )
+ {
+ int i;
+ for( i = 0; i < i_size/2; i++ )
+ psz_string[i] = GetWLE( &p_data[2*i] );
+ psz_string[i_size/2] = '\0'; \
+ }
+ }
+ else
+ {
+ psz_string = strdup("");
+ }
+ ASF_SKIP(i_size);
+ *pp_data = p_data;
+ return psz_string;
+}
+#define ASF_READS(n) AsfObjectHelperReadString( p_peek, i_peek, (uint8_t**)&p_data, n )
+
/****************************************************************************
*
****************************************************************************/
asf_metadata_record_t *p_record = &p_meta->record[i];
int i_name;
int i_data;
- int j;
- if( &p_data[2+2+2+2+4] > &p_peek[i_peek] )
+ if( !ASF_HAVE( 2+2+2+2+4 ) )
break;
- if( GetWLE( p_data ) != 0 )
+ if( ASF_READ2() != 0 )
break;
- p_data += 2;
- p_record->i_stream = GetWLE( p_data ); p_data += 2;
- i_name = GetWLE( p_data ); p_data += 2;
- p_record->i_type = GetWLE( p_data ); p_data += 2;
- i_data = GetDWLE( p_data ); p_data += 4;
+ p_record->i_stream = ASF_READ2();
+ i_name = ASF_READ2();
+ p_record->i_type = ASF_READ2();
+ i_data = ASF_READ4();
- if( &p_data[i_name+i_data] > &p_peek[i_peek] )
+ if( !ASF_HAVE( i_name + i_data ) )
break;
/* Read name */
- p_record->psz_name = malloc( i_name/2 + 1 );
- for( j = 0; j < i_name/2; j++ )
- {
- p_record->psz_name[j] = GetWLE( p_data ); p_data += 2;
- }
- p_record->psz_name[j] = 0;
+ p_record->psz_name = ASF_READS( i_name );
/* Read data */
if( p_record->i_type == ASF_METADATA_TYPE_STRING )
{
- p_record->p_data = malloc( i_data/2 + 1 );
+ p_record->p_data = ASF_READS( i_data );
p_record->i_data = i_data/2; /* FIXME Is that needed ? */
- for( j = 0; j < i_data/2; j++ )
- {
- p_record->p_data[j] = GetWLE( &p_data[2*j] );
- }
- p_record->p_data[j] = 0; /* just to make sure */
-
- p_data += i_data;
}
else if( p_record->i_type == ASF_METADATA_TYPE_BYTE )
{
}
else if( p_record->i_type == ASF_METADATA_TYPE_QWORD )
{
- p_record->i_val = GetQWLE( p_data ); p_data += 8;
+ p_record->i_val = ASF_READ8();
}
else if( p_record->i_type == ASF_METADATA_TYPE_DWORD )
{
- p_record->i_val = GetDWLE( p_data ); p_data += 4;
+ p_record->i_val = ASF_READ4();
}
else if( p_record->i_type == ASF_METADATA_TYPE_WORD )
{
- p_record->i_val = GetWLE( p_data ); p_data += 2;
+ p_record->i_val = ASF_READ2();
}
else if( p_record->i_type == ASF_METADATA_TYPE_BOOL )
{
- p_record->i_val = GetWLE( p_data ); p_data += 2;
+ p_record->i_val = ASF_READ2();
}
else
{
p_he->i_header_extension_size = GetDWLE( p_peek + 42 );
if( p_he->i_header_extension_size )
{
+ if( i_peek-46 < (int)p_he->i_header_extension_size )
+ return VLC_EGENERIC;
+
p_he->p_header_extension_data =
malloc( p_he->i_header_extension_size );
+ if( !p_he->p_header_extension_data )
+ return VLC_ENOMEM;
+
memcpy( p_he->p_header_extension_data, p_peek + 46,
p_he->i_header_extension_size );
}
{
p_cl->codec = calloc( p_cl->i_codec_entries_count,
sizeof( asf_codec_entry_t ) );
+ if( !p_cl->codec )
+ return VLC_ENOMEM;
for( i_codec = 0; i_codec < p_cl->i_codec_entries_count; i_codec++ )
{
asf_codec_entry_t *p_codec = &p_cl->codec[i_codec];
- int i_len, i;
- p_codec->i_type = GetWLE( p_data ); p_data += 2;
+ if( !ASF_HAVE( 2+2+2 ) )
+ break;
+
+ /* */
+ p_codec->i_type = ASF_READ2();
+
+ /* XXX the length here are the number of *unicode* characters and
+ * not of bytes like nearly every elsewhere */
+
/* codec name */
- i_len = GetWLE( p_data ); p_data += 2;
- p_codec->psz_name = calloc( i_len + 1, sizeof(char) );
- for( i = 0; i < i_len; i++ )
- {
- p_codec->psz_name[i] = GetWLE( p_data + 2*i );
- }
- p_codec->psz_name[i_len] = '\0';
- p_data += 2 * i_len;
+ p_codec->psz_name = ASF_READS( 2*ASF_READ2() );
/* description */
- i_len = GetWLE( p_data ); p_data += 2;
- p_codec->psz_description = calloc( i_len + 1, sizeof(char) );
- for( i = 0; i < i_len; i++ )
- {
- p_codec->psz_description[i] = GetWLE( p_data + 2*i );
- }
- p_codec->psz_description[i_len] = '\0';
- p_data += 2 * i_len;
+ p_codec->psz_description = ASF_READS( 2*ASF_READ2() );
/* opaque information */
- p_codec->i_information_length = GetWLE( p_data ); p_data += 2;
- if( p_codec->i_information_length > 0 )
+ p_codec->i_information_length = ASF_READ2();
+ if( p_codec->i_information_length > 0 && ASF_HAVE( p_codec->i_information_length ) )
{
p_codec->p_information = malloc( p_codec->i_information_length );
memcpy( p_codec->p_information, p_data, p_codec->i_information_length );
p_codec->p_information = NULL;
}
}
- }
- else
- {
- p_cl->codec = NULL;
+ p_cl->i_codec_entries_count = i_codec;
}
#ifdef ASF_DEBUG
for( i_codec = 0; i_codec < p_cl->i_codec_entries_count; i_codec++ )
{
-#define codec p_cl->codec[i_codec]
+ const asf_codec_entry_t *p_codec = &p_cl->codec[i_codec];
+
msg_Dbg( s, " - codec[%d] %s name:\"%s\" "
"description:\"%s\" information_length:%d",
- i_codec, ( codec.i_type == ASF_CODEC_TYPE_VIDEO ) ?
- "video" : ( ( codec.i_type == ASF_CODEC_TYPE_AUDIO ) ?
+ i_codec, ( p_codec->i_type == ASF_CODEC_TYPE_VIDEO ) ?
+ "video" : ( ( p_codec->i_type == ASF_CODEC_TYPE_AUDIO ) ?
"audio" : "unknown" ),
- codec.psz_name, codec.psz_description,
- codec.i_information_length );
-#undef codec
+ p_codec->psz_name, p_codec->psz_description,
+ p_codec->i_information_length );
}
#endif
p_data += i_size;
p_data = p_peek + 24;
-
- i_title = GetWLE( p_data ); p_data += 2;
- i_artist= GetWLE( p_data ); p_data += 2;
- i_copyright = GetWLE( p_data ); p_data += 2;
- i_description = GetWLE( p_data ); p_data += 2;
- i_rating = GetWLE( p_data ); p_data += 2;
+
+ i_title = ASF_READ2();
+ i_artist = ASF_READ2();
+ i_copyright = ASF_READ2();
+ i_description = ASF_READ2();
+ i_rating = ASF_READ2();
+
+ if( !ASF_HAVE( i_title+i_artist+i_copyright+i_description+i_rating ) )
+ {
+ vlc_iconv_close( cd );
+ return VLC_EGENERIC;
+ }
GETSTRINGW( p_cd->psz_title, i_title );
GETSTRINGW( p_cd->psz_artist, i_artist );
p_data = &p_peek[24];
- p_ll->i_language = GetWLE( &p_data[0] ); p_data += 2;
+ p_ll->i_language = ASF_READ2();
if( p_ll->i_language > 0 )
{
p_ll->ppsz_language = calloc( p_ll->i_language, sizeof( char *) );
for( i = 0; i < p_ll->i_language; i++ )
{
- char *psz;
- int i_size = *p_data++;
- int i_len;
-
- psz = calloc( i_size/2 + 1, sizeof(char) );
- for( i_len = 0; i_len < i_size/2; i_len++ )
- {
- psz[i_len] = GetWLE( p_data + 2*i_len );
- }
- psz[i_size/2] = '\0'; \
- p_data += i_size;
-
- p_ll->ppsz_language[i] = psz;
+ if( !ASF_HAVE(1) )
+ break;
+ p_ll->ppsz_language[i] = ASF_READS( ASF_READ1() );
}
+ p_ll->i_language = i;
}
#ifdef ASF_DEBUG
p_data = &p_peek[24];
- p_sb->i_bitrate = GetWLE( &p_data[0] ); p_data += 2;
- if( p_sb->i_bitrate > 127 ) p_sb->i_bitrate = 127; /* Buggy ? */
+ p_sb->i_bitrate = ASF_READ2();
+ if( p_sb->i_bitrate > 127 )
+ p_sb->i_bitrate = 127; /* Buggy ? */
for( i = 0; i < p_sb->i_bitrate; i++ )
{
- p_sb->bitrate[i].i_stream_number = GetWLE( &p_data[0] )& 0x7f;
- p_sb->bitrate[i].i_avg_bitrate = GetDWLE( &p_data[2] );
-
- p_data += 2+4;
+ if( !ASF_HAVE(2 + 4) )
+ break;
+ p_sb->bitrate[i].i_stream_number = ASF_READ2()& 0x7f;
+ p_sb->bitrate[i].i_avg_bitrate = ASF_READ4();
}
+ p_sb->i_bitrate = i;
#ifdef ASF_DEBUG
msg_Dbg( s,"read \"stream bitrate properties object\"" );
sizeof(char*) );
for( i = 0; i < p_esp->i_stream_name_count; i++ )
{
- int i_size;
- char *psz;
- int i_len;
-
- p_esp->pi_stream_name_language[i] = GetWLE( &p_data[0] );
- i_size = GetWLE( &p_data[2] );
- p_data += 2+2;
-
- psz = calloc( i_size/2 + 1, sizeof(char) );
- for( i_len = 0; i_len < i_size/2; i_len++ )
- {
- psz[i_len] = GetWLE( p_data + 2*i_len );
- }
- psz[i_size/2] = '\0'; \
- p_data += i_size;
-
- p_esp->ppsz_stream_name[i] = psz;
+ if( !ASF_HAVE( 2+2 ) )
+ break;
+ p_esp->pi_stream_name_language[i] = ASF_READ2();
+ p_esp->ppsz_stream_name[i] = ASF_READS( ASF_READ2() );
}
+ p_esp->i_stream_name_count = i;
for( i = 0; i < p_esp->i_payload_extension_system_count; i++ )
{
- /* Skip them */
- int i_size = GetDWLE( &p_data[16 + 2] );
-
- p_data += 16+2+4+i_size;
+ ASF_SKIP( 16 ); // GUID
+ ASF_SKIP( 2 );
+ ASF_SKIP( ASF_READ4() );
}
p_esp->p_sp = NULL;
p_data = &p_peek[24];
ASF_GetGUID( &p_ae->type, &p_data[0] );
- p_ae->i_stream_number_count = GetWLE( &p_data[16] );
+ ASF_SKIP( 16 );
+ p_ae->i_stream_number_count = ASF_READ2();
+ p_ae->pi_stream_number = calloc( p_ae->i_stream_number_count, sizeof(int) );
- p_data += 16 + 2;
- p_ae->pi_stream_number = calloc( p_ae->i_stream_number_count,
- sizeof(int) );
for( i = 0; i < p_ae->i_stream_number_count; i++ )
{
- p_ae->pi_stream_number[i] = GetWLE( p_data );
- p_data += 2;
+ if( !ASF_HAVE(2) )
+ break;
+ p_ae->pi_stream_number[i] = ASF_READ2();
}
+ p_ae->i_stream_number_count = i;
#ifdef ASF_DEBUG
msg_Dbg( s, "read \"advanced mutual exclusion object\"" );
p_data = &p_peek[24];
- p_sp->i_priority_count = GetWLE( &p_data[0] );
- p_data += 2;
+ p_sp->i_priority_count = ASF_READ2();
p_sp->pi_priority_flag = calloc( p_sp->i_priority_count, sizeof(int) );
p_sp->pi_priority_stream_number =
for( i = 0; i < p_sp->i_priority_count; i++ )
{
- p_sp->pi_priority_stream_number[i] = GetWLE( p_data ); p_data += 2;
- p_sp->pi_priority_flag[i] = GetWLE( p_data ); p_data += 2;
+ if( !ASF_HAVE(2+2) )
+ break;
+ p_sp->pi_priority_stream_number[i] = ASF_READ2();
+ p_sp->pi_priority_flag[i] = ASF_READ2();
}
+ p_sp->i_priority_count = i;
+
#ifdef ASF_DEBUG
msg_Dbg( s, "read \"stream prioritization object\"" );
for( i = 0; i < p_sp->i_priority_count; i++ )
p_data = &p_peek[24];
- p_ec->i_count = GetWLE( p_data ); p_data += 2;
- p_ec->ppsz_name = calloc( p_ec->i_count, sizeof(char*) );
+ p_ec->i_count = ASF_READ2();
+ p_ec->ppsz_name = calloc( p_ec->i_count, sizeof(char*) );
p_ec->ppsz_value = calloc( p_ec->i_count, sizeof(char*) );
+ if( !p_ec->ppsz_name || !p_ec->ppsz_value )
+ {
+ free( p_ec->ppsz_name );
+ free( p_ec->ppsz_value );
+ return VLC_ENOMEM;
+ }
for( i = 0; i < p_ec->i_count; i++ )
{
int i_size;
int i_type;
- int i_len;
-#define GETSTRINGW( psz_str, i_size ) \
- psz_str = calloc( i_size/2 + 1, sizeof( char ) ); \
- for( i_len = 0; i_len < i_size/2; i_len++ ) \
- { \
- psz_str[i_len] = GetWLE( p_data + 2*i_len ); \
- } \
- psz_str[i_size/2] = '\0';
- i_size = GetWLE( p_data ); p_data += 2;
- GETSTRINGW( p_ec->ppsz_name[i], i_size );
- p_data += i_size;
+ if( !ASF_HAVE(2 + 2+2) )
+ break;
+
+ p_ec->ppsz_name[i] = ASF_READS( ASF_READ2() );
/* Grrr */
- i_type = GetWLE( p_data ); p_data += 2;
- i_size = GetWLE( p_data ); p_data += 2;
+ i_type = ASF_READ2();
+ i_size = ASF_READ2();
+
if( i_type == 0 )
{
- GETSTRINGW( p_ec->ppsz_value[i], i_size );
+ p_ec->ppsz_value[i] = ASF_READS( i_size );
}
else if( i_type == 1 )
{
- int j;
/* Byte array */
+ static const char hex[16] = "0123456789ABCDEF";
+ int j;
+
p_ec->ppsz_value[i] = malloc( 2*i_size + 1 );
for( j = 0; j < i_size; j++ )
{
- static const char hex[16] = "0123456789ABCDEF";
- p_ec->ppsz_value[i][2*j+0] = hex[p_data[0]>>4];
- p_ec->ppsz_value[i][2*j+1] = hex[p_data[0]&0xf];
+ const uint8_t v = ASF_READ1();
+ p_ec->ppsz_value[i][2*j+0] = hex[v>>4];
+ p_ec->ppsz_value[i][2*j+1] = hex[v&0xf];
}
p_ec->ppsz_value[i][2*i_size] = '\0';
}
else if( i_type == 2 )
{
/* Bool */
- p_ec->ppsz_value[i] = strdup( *p_data ? "true" : "false" );
+ p_ec->ppsz_value[i] = strdup( ASF_READ1() ? "true" : "false" );
+ ASF_SKIP(i_size-1);
}
else if( i_type == 3 )
{
/* DWord */
- asprintf( &p_ec->ppsz_value[i], "%d", GetDWLE(p_data));
+ asprintf( &p_ec->ppsz_value[i], "%d", ASF_READ4() );
}
else if( i_type == 4 )
{
/* QWord */
- asprintf( &p_ec->ppsz_value[i], "%"PRId64, GetQWLE(p_data));
+ asprintf( &p_ec->ppsz_value[i], "%"PRId64, ASF_READ8() );
}
else if( i_type == 5 )
{
/* Word */
- asprintf( &p_ec->ppsz_value[i], "%d", GetWLE(p_data));
+ asprintf( &p_ec->ppsz_value[i], "%d", ASF_READ2() );
}
else
+ {
p_ec->ppsz_value[i] = NULL;
-
- p_data += i_size;
-
-
-
-#undef GETSTRINGW
-
+ ASF_SKIP(i_size);
+ }
}
+ p_ec->i_count = i;
#ifdef ASF_DEBUG
msg_Dbg( s, "read \"extended content description object\"" );
{ &asf_object_stream_type_video, "Stream Type Video" },
{ &asf_object_stream_type_command, "Stream Type Command" },
{ &asf_object_language_list, "Language List" },
- { &asf_object_stream_bitrate_properties, "Stream Bitrate Propoerties" },
+ { &asf_object_stream_bitrate_properties, "Stream Bitrate Properties" },
{ &asf_object_padding, "Padding" },
{ &asf_object_extended_stream_properties, "Extended Stream Properties" },
{ &asf_object_advanced_mutual_exclusion, "Advanced Mutual Exclusion" },
projects / vlc / commitdiff